GB1457536A – Liquid crystal dynamic drive circuit
– Google Patents
GB1457536A – Liquid crystal dynamic drive circuit
– Google Patents
Liquid crystal dynamic drive circuit
Info
Publication number
GB1457536A
GB1457536A
GB5409073A
GB5409073A
GB1457536A
GB 1457536 A
GB1457536 A
GB 1457536A
GB 5409073 A
GB5409073 A
GB 5409073A
GB 5409073 A
GB5409073 A
GB 5409073A
GB 1457536 A
GB1457536 A
GB 1457536A
Authority
GB
United Kingdom
Prior art keywords
segments
digit
display
pulses
period
Prior art date
1972-11-22
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5409073A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1972-11-22
Filing date
1973-11-21
Publication date
1976-12-01
1973-11-21
Application filed by Sharp Corp
filed
Critical
Sharp Corp
1976-12-01
Publication of GB1457536A
publication
Critical
patent/GB1457536A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
239000004973
liquid crystal related substance
Substances
0.000
title
abstract
2
239000011159
matrix material
Substances
0.000
abstract
1
Classifications
G—PHYSICS
G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
G09G3/16—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source
G09G3/18—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions by control of light from an independent source using liquid crystals
Abstract
1457536 Matrix displays and circuits therefor SHARP KK 21 Nov 1973 [22 Nov 1972] 54090/73 Heading G5C A plurality of multi segment liquid crystal display devices D1 … Dm are sequentially and cyclically energized to display a multi digit number; a h.f. erase signal being applied to each device for a short period when the device selection pulse T10, T20 … Tmo moves from one device to the next. Data is recirculated through a register X and supplied one digit at a time to a buffer store XB. During a digit display period, the common electrode A1 of the selected device D1 is energized by the signal T10 from a timing counter TC, the binary information in store XB is decoded at SD and applied to the appropriate segments K1 … Kn of the devices. The signals applied both to the common electrodes A and segments K are reversed in polarity midway through each display period by gating circuits TL and Gp 1 , Gp 2 under the control of pulses # 1 , # 2 . The arrangement is such that the potential applied to the common electrode and segments are 180 degrees out of phase when the segments are to be displayed and in phase when the segments are not to be displayed. At the end of each digit display period when the device selection signal e.g. T10 returns to zero, a pulse α 2 opens a gate CG1. The circulating information in register X causes the contents of buffer XB to change at high frequency so that a high frequency erase signal is applied to the segments K. Pulses α 1 coincident with pulses α 2 are applied to circuits TL and prevent the issue of the next device selection signal T20 during the buffer updating and erasing period. This method of operation prevents the display of meaningless symbols.
GB5409073A
1972-11-22
1973-11-21
Liquid crystal dynamic drive circuit
Expired
GB1457536A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP11755472A
JPS5317257B2
(en)
1972-11-22
1972-11-22
Publications (1)
Publication Number
Publication Date
GB1457536A
true
GB1457536A
(en)
1976-12-01
Family
ID=14714675
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5409073A
Expired
GB1457536A
(en)
1972-11-22
1973-11-21
Liquid crystal dynamic drive circuit
Country Status (5)
Country
Link
US
(1)
US3898646A
(en)
JP
(1)
JPS5317257B2
(en)
BR
(1)
BR7309097D0
(en)
CA
(1)
CA1009337A
(en)
GB
(1)
GB1457536A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0065044A1
(en)
*
1981-05-19
1982-11-24
Liquid Crystal Technology Limited
Electronic display apparatus
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS5116827A
(en)
*
1974-07-31
1976-02-10
Sharp Kk
EKISHOKUDOHOSHIKI
JPS5189348A
(en)
*
1975-02-04
1976-08-05
US4110967A
(en)
*
1975-09-02
1978-09-05
Hiro Fujita
Method and system for driving liquid crystal display device
JPS5911916B2
(en)
*
1976-05-25
1984-03-19
株式会社日立製作所
Display data synthesis circuit
US4271410A
(en)
*
1978-08-10
1981-06-02
Rockwell International Corporation
LCD Data processor driver and method
US4359222A
(en)
*
1978-10-30
1982-11-16
Smith Engineering
Hand-held electronic game playing device with replaceable cartridges
JPS564183A
(en)
*
1979-06-21
1981-01-17
Casio Computer Co Ltd
Display system
JPS6336360Y2
(en)
*
1986-06-10
1988-09-27
JPS63144399A
(en)
*
1986-12-08
1988-06-16
セイコーインスツルメンツ株式会社
Display device
US6046716A
(en)
*
1996-12-19
2000-04-04
Colorado Microdisplay, Inc.
Display system having electrode modulation to alter a state of an electro-optic layer
US6078303A
(en)
1996-12-19
2000-06-20
Colorado Microdisplay, Inc.
Display system having electrode modulation to alter a state of an electro-optic layer
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
JPS4810892B1
(en)
*
1968-12-23
1973-04-09
US3786486A
(en)
*
1971-08-11
1974-01-15
Olivetti & Co Spa
Multiplex driving circuit
JPS4917937A
(en)
*
1972-06-06
1974-02-16
1972
1972-11-22
JP
JP11755472A
patent/JPS5317257B2/ja
not_active
Expired
1973
1973-11-19
CA
CA186,078A
patent/CA1009337A/en
not_active
Expired
1973-11-20
BR
BR9097/73A
patent/BR7309097D0/en
unknown
1973-11-21
US
US418043A
patent/US3898646A/en
not_active
Expired – Lifetime
1973-11-21
GB
GB5409073A
patent/GB1457536A/en
not_active
Expired
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0065044A1
(en)
*
1981-05-19
1982-11-24
Liquid Crystal Technology Limited
Electronic display apparatus
Also Published As
Publication number
Publication date
BR7309097D0
(en)
1975-06-10
DE2358061B2
(en)
1976-02-12
DE2358061A1
(en)
1974-06-12
CA1009337A
(en)
1977-04-26
US3898646A
(en)
1975-08-05
JPS4975224A
(en)
1974-07-19
JPS5317257B2
(en)
1978-06-07
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Legal Events
Date
Code
Title
Description
1977-04-27
PS
Patent sealed [section 19, patents act 1949]
1993-12-22
PE20
Patent expired after termination of 20 years
Effective date:
19931120
